| 摘要 |
<p>PCT No. PCT/IT94/00089 Sec. 371 Date Feb. 26, 1996 Sec. 102(e) Date Feb. 26, 1996 PCT Filed Jun. 21, 1994 PCT Pub. No. WO95/00282 PCT Pub. Date Jan. 5, 1995A method for cutting a piece (2) of ferrous material by a laser beam (3), wherein an oxygen jet is conveyed on to cutting area (6) through a solid walled duct (13), guiding the jet substantially until it comes into contact with a surface (7) of workpiece (2); the laser beam (3) exercising on workpiece (2) a power density greater than 106 kW/cm2, oxygen being conveyed on to the workpiece (2) with such impact pressure, as to trigger, at such power density, iron oxidation exothermic reactions of the combustion type, and being conveyed in such quantities, as to slightly exceed the relevant stoichiometric ratio, so that such reactions may be complete, as well as maintained under dynamic balance conditions.</p> |
